Title :
High power conversion efficiencies and scaling issues for multimode vertical-cavity top-surface-emitting lasers
Author :
Lear, K.L. ; Kilcoyne, S.P. ; Chalmers, S.A.
Author_Institution :
Dept. of Photonics Res., Sandia Nat. Labs., Albuquerque, NM, USA
fDate :
7/1/1994 12:00:00 AM
Abstract :
We report advances in the power conversion efficiencies of vertical-cavity top-surface-emitting lasers defined by proton implantation. Efficiencies as high as 13.4% and 15.8% have been obtained for single-mode and multimode operation, respectively. Scaling issues are addressed including the size dependence of threshold current, series resistance, lasing output power, and power conversion efficiency. We find that devices between 15 μm and 25 μm diameters show the highest power conversion efficiency due to the threshold current not scaling with the conductance and output power. Device geometries with contact apertures both equal to and less than (overlapping) the active region diameter were investigated.
Keywords :
electric current; laser cavity resonators; laser modes; power conversion; semiconductor lasers; 13.4 percent; 15 to 25 mum; 15.8 percent; active region diameter; contact apertures; device geometries; high power conversion efficiencies; lasing output power; multimode operation; multimode vertical-cavity top-surface-emitting lasers; proton implantation; scaling issues; series resistance; size dependence; threshold current; Apertures; Doping; Implants; Mirrors; Power conversion; Power generation; Power lasers; Surface emitting lasers; Threshold current; Vertical cavity surface emitting lasers;
Journal_Title :
Photonics Technology Letters, IEEE
